Last updated Alpha chord as mistuned major chord Play(help·info).
In musicmistuning is most generally the action of incorrectly tuning or the state of being out of tune. Mistuning is also the displacement of a pitch a semitone away from its standard position in a stable tonal structure such as the most common perfect fourth or fifth, which mistuned in the opposite directions produce a tritone. A portion of the alpha chord:E-G-C-E♭, may be considered an E major chord: E-G♯-B-E, whose members are mistuned. (Wilson 1992, p.9) See: alteration and chord substitution.
Music is an art form and cultural activity whose medium is sound organized in time. General definitions of music include common elements such as pitch, rhythm, dynamics, and the sonic qualities of timbre and texture. Different styles or types of music may emphasize, de-emphasize or omit some of these elements. Music is performed with a vast range of instruments and vocal techniques ranging from singing to rapping; there are solely instrumental pieces, solely vocal pieces and pieces that combine singing and instruments. The word derives from Greek μουσική . See glossary of musical terminology.
In music, there are two common meanings for tuning:
In music theory, the tritone is defined as a musical interval composed of three adjacent whole tones. For instance, the interval from F up to the B above it is a tritone as it can be decomposed into the three adjacent whole tones F–G, G–A, and A–B. According to this definition, within a diatonic scale there is only one tritone for each octave. For instance, the above-mentioned interval F–B is the only tritone formed from the notes of the C major scale. A tritone is also commonly defined as an interval spanning six semitones. According to this definition, a diatonic scale contains two tritones for each octave. For instance, the above-mentioned C major scale contains the tritones F–B and B–F. In twelve-equal temperament, the tritone divides the octave exactly in half.
In mechanicsmistuning is a lack of symmetry present in a real object that ideally is perfectly symmetric. This phenomenon is studied in relation to turbine disks, for example; it can cause an increase of the forced response that can bring about unexpected failures due to fatigue. Mistuning is caused by manufacturer tolerances, non-homogeneity of the material, the usage, etc., and so it is unavoidable. It has been observed that the amount of increase in the forced response of mistuned turbine disks strongly depends on the physical characteristics of the disk itself: actual efforts to limit the negative effects of this phenomenon upon turbine disks focus on understanding how to design a disk that is influenced minimally by mistuning in the working rotational speed.
Mechanics is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. The scientific discipline has its origins in Ancient Greece with the writings of Aristotle and Archimedes. During the early modern period, scientists such as Galileo, Kepler, and Newton laid the foundation for what is now known as classical mechanics. It is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. It can also be defined as a branch of science which deals with the motion of and forces on objects. The field is yet less widely understood in terms of quantum theory.
Sources
Kárpáti, János (1975). Bartók's String Quartets. Translated by Fred MacNicol. Budapest: Corvina Press. Cited in Wilson (1992).
The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency.
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